John Fleng Steffensen -  Research

Research

My research concentrate on comparative respiratory and circulatory physiology of fish, ranging from questions concerning metabolic cold adaptation in Arctic and Antarctic fish, to possible benefits and problems for fish swimming in schools. In addition I am studying problems related to improving growth of fish in aquaculture, the adaptation of fish to environmental hypoxia and temperature, metabolism and kinematics of swimming fish, and the form and function of the primary and secondary circulatory systems in teleosts.

Further information concerning:

1: The dispute whether metabolic cold adaptation in Arctic and Antarctic fish is a fact or an artefact (paper 2, paper 3).

               Fishing for polar cod (Boreogadus saida) at the polynia close to Igloolik, NWT, Canada. Foto: J. F. Steffensen.

2: The form and function of the primary and secondary circulatory systems in teleosts (paper 2, paper 3).

3: Benefits and limitations for fish swimming in schools, particularly sea bass Morone saxatilis and Atlantic herring Clupea harengus. (paper 3).

4: The adaptation of fish to environmental hypoxia and temperature, including temperature preference.

5: Metabolism, kinematics and muscle dynamics, and circulation of swimming fish - mainly in carangiforms but also labriform and balistiform swimmers.

6: Projects physiological performance, tolerance and growth of fish in aquaculture, particularly sturgeon, eel, tilapia and trout.

7: Biology, Behaviour and Physiology of Atlantic sailfish

8: Biology of the old and cold Greenland shark.

9: Optimizing growth in aquaculture - GUDP-Project.